From mboxrd@z Thu Jan 1 00:00:00 1970 From: nicolas.ferre@atmel.com (Nicolas Ferre) Date: Fri, 17 Jun 2016 12:05:45 +0200 Subject: [PATCH 0/4] tty/serial: atmel: rework tasklets and shutdown sequence Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org We experienced some issues with how the atmel_serial driver was dealing with tasklets. First, a single tasklet was used for both RX and TX paths which was leading to calling DMA residue checking routines frequently without reason. So I split the RX and TX paths with one tasklet for each. Secondly, as we experienced some deadlocks, I reinforced the shutdown function of this driver by following the recommended sequence that is described here: https://lwn.net/Articles/588457/ The first 3 patches have already been posted on May 12th. The 4th patch is built on top of them, this is why make a series with them... Bye, Ludovic Desroches (1): tty/serial: atmel: add comment for the ring buffer size macro Nicolas Ferre (3): tty/serial: atmel: re-integrate status check in irq handler tty/serial: atmel: split tx and rx paths tty/serial: atmel: enforce tasklet init and termination sequences drivers/tty/serial/atmel_serial.c | 129 +++++++++++++++++++++++--------------- 1 file changed, 78 insertions(+), 51 deletions(-) -- 2.9.0